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2.2 Newton’s laws

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Question 5
F

An ice hockey puck slides across a flat ice rink.

a.

The puck slows down very gradually.

Explain why. Use ideas about forces in your answer.

[2]
b.

A student says:

'If there was no friction, the puck would still stop, because a force is needed to keep an object moving.'

Explain why the student is wrong.

[2]
c.

The puck hits the side wall of the rink and bounces straight back at the same speed.

Explain why a resultant force must have acted on the puck, even though its speed is the same.

[2]
Markscheme

2.2 Newton’s laws Questions

  1. GCSE
  2. /Physics
  3. /2.2 Newton’s laws

50 exam-style questions on OCR GCSE Physics 2.2 Newton’s laws, covering 2.2.1 Interactions between objects, 2.2.2 Force pairs in interactions, 2.2.3 Forces as vectors, 2.2.4 Newton's first law, 2.2.5 Resolving forces with vector diagrams, 2.2.6 Forces acting on an isolated object, 2.2.7 Free body diagrams and resultant force, 2.2.8 Free body diagrams for balanced forces, 2.2.9 Newton's second law, 2.2.10 Inertia and inertial mass, 2.2.11 Momentum in collisions, 2.2.12 Relating force, mass, velocity and acceleration, 2.2.13 Work done by a force, 2.2.14 Work, stored energy and units of energy, 2.2.15 Power as the rate of energy transfer, 2.2.16 Newton's third law, and 2.2.17 Circular motion and changing velocity. Each one has a worked solution and a mark scheme showing where the marks go.

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